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What two radioisotopes have the same decay mode?
jnb
What two factors determine the rate of colonization of an island?
Decay rate and rate of regrowth
What are the two medical applications of radioisotopes?
- radiodiagnostic- treatment with radioisotopes
How do radioisotopes of an element differ feom other isotopes?
Radioisotopes are "radioactive isotopes"; they are not stable. Radioactive atoms will decay, or break apart into other atoms, by emitting an electron, or a neutron or a positron or an alpha particle (2 protons and two neutrons). The rate at which this happens is measured by the "half-life"; after one half-life, half of the atoms will have decayed. After another half-life, half of the remaining atoms will have decayed. Atoms with short half-lives are highly radioactive, and can be fairly dangerous. Atoms with long half-lives are only slightly radioactive, and aren't all that dangerous.
What are two types of radioactive decay?
The two types of radioactive decay are alpha and beta. Generally, in alpha decay the nucleus will lose 2 protons and 2 neutrons (it's a helium nucleus). Beta decay involves a neutron losing an electron and becoming a proton, so the atomic mass remains the same, but the atomic number increases by one since there is another proton.
What actually decays in radioactive decay?
The nucleus of the atom decays, and in the process, the nucleus transforms into another element, or into an isotope or isomer of the same element. In radioactive decay, the nucleus always emits some kind of particle(s). It is the high-energy emission of these particles that we call radiation. There are many different types of radioactive decay:Alpha decay results in the emission of an alpha particle (two neutrons and two protons)Beta decay results in the emission of a beta particle (an electron or a positron)Neutron decay results in the emission of a neutronProton decay results in the emission of a protonGamma decay results in the emission of a gamma particle (a photon)Neutrino decay results in the emission of a neutrino or antineutrinoIn some cases, a combination of the above emissions takes place. For example in double beta decay, a single nucleus emits two electrons and two antineutrinos in the same event.
What is rate when two reactions are in balance?
When the rate of the forward and reverse reaction is the same, the system is at equilbirium.
What are two uses of radioisotypes?
Radiometric dating is a common use of radioisotopes to determine the age of rocks, fossils, and archaeological artifacts. Radioisotopes are also used in medicine, such as in imaging techniques like PET scans and in cancer therapy.
Alpha and beta decay emit what?
Alpha decay emits an alpha particle, which consists of two protons and two neutrons. Beta decay emits either an electron (beta minus decay) or a positron (beta plus decay).
Which two elements undergo alpha decay?
The two elements that undergo alpha decay are uranium and thorium.
How can radioisotopes determine the age of objects?
answ2. Radioisotopes decay at a rate specific to the particular element (and its isotope). Carbon for example has two stable isotopes (C12 and C13), and another half-dozen or so of short-lived ones. C14 is a natural isotope with a half-life of around 5700 years, and is very useful for dating archaeological remains.Tin for example has ten stable isotopes, and up towards 20 radioactive ones.Many other isotopes are used for dating different items, and some even have half-lives in excess of the age of the Earth. For many purposes these may considered as stable.Reverting to the carbon, after 5700 years, there is one-half of the C14 left that there was previously. After 11 400 years there would be a quarter of the original quantity and so on.
A rate compares two numbers using the same units?
nope
